Plant Material Vaporizer with Two-Stage Heating Control
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Solution Overview
Problem
Existing vaporizers for cannabis and other plant materials often result in pyrolysis and non-uniform heating, leading to inefficiencies in vaporizing active ingredients without causing thermal damage, due to rapid heating and temperature overshooting.
Innovation Solution
A vaporizer employing a two-stage heating process, where the first heating stage rapidly heats the plant material to just below the vaporization temperature, followed by a slower second stage upon user inhalation, to prevent pyrolysis and ensure uniform vaporization, using a heating element and temperature sensor controlled by circuitry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If rapid heating is used to vaporize active ingredients quickly, then productivity is improved, but pyrolysis and thermal damage occur
Solution Approach 1:
The heating process is segmented into multiple stages: a first rapid heating stage that brings the plant material to near-vaporization temperature, followed by a second controlled heating stage that completes vaporization. This segmentation allows the system to achieve both rapid productivity and prevention of pyrolysis by controlling the maximum temperature reached in each stage.
Solution Approach 2:
The first heating stage performs preliminary action by rapidly heating the plant material to a temperature close to (but below) the vaporization point. This preliminary heating prepares the material for complete vaporization in the second stage, achieving most of the vaporization effect before the dangerous temperature threshold is approached.
2Speed
If rapid heating is applied to achieve quick vaporization, then heating speed is improved, but temperature distribution uniformity deteriorates
Solution Approach 1:
The heating process is divided into two sequential stages with different heating rates. The first stage uses rapid heating to efficiently raise temperature, while the second stage uses slower, more controlled heating to complete vaporization. This temporal segmentation of heating rates prevents thermal gradients and ensures uniform temperature distribution throughout the plant material.
Solution Approach 2:
The heating process employs periodic action with two distinct phases: a rapid heating phase followed by a controlled vaporization phase. This periodic variation in heating rate allows the system to efficiently raise temperature while preventing overheating and ensuring uniform thermal distribution across the material.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method effectively prevents pyrolysis and achieves uniform heating, ensuring most active ingredients are vaporized while minimizing thermal damage, with rapid heating to vaporization temperature in a short time and controlled cooling when not in use.
Implementation Method 1
the heating element includes one or more electrodes that heat the capsule via resistive heating, by driving a current into a portion of the capsule
Implementation Method 2
a phase-change material that is coupled to the capsule, the phase-change material being configured to undergo a phase change at a temperature that is below a pyrolysis temperature of the plant material
Implementation Method 3
heating the plant material to the vaporization temperature of the active ingredient in a second, slower heating step
Data Source
AI summary
Apparatus and methods are described for use with a vaporizer that vaporizes at least one active ingredient of a plant material. In response to receiving a first input to the vaporizer, the plant material is heated, in a first heating step. An indication of the temperature of the plant material is detected, and, in response to detecting an indication that the temperature of the plant material is at a first temperature, the first heating step is terminated, by withholding causing further temperature increase of the plant material. The first temperature is less than 95 percent of the vaporization temperature of the active ingredient. Subsequently, a second input is received at the vaporizer. In response thereto, the plant material is heated to the vaporization temperature, in a second heating step. Other applications are also described.